As I read the changes and some of the replies here, I think overall I like the update (haven't tested yet but i see the potential), but I'm concerned about Oath of Freedom being removed...
I get where the change to remove oath of protection in favor of blessed barrier, blessing of devotion, inhibit pain, etc. But in terms of trying to keep clerics unique and reduce redundancy, I think removing oath of freedom is a mistake-- that one really sets a cleric apart, and is very useful. At the same time, Healing Light seems redundant with the new Circle of Healing...
Even though it's cool we can summon hammers, I think it will be moot compared to real gear, and I like the idea of choosing to use a variety of gear instead of a basic summoned hammer. Personally I also like the idea of two-handed maces. Maybe tweak the hammer summoning a bit... moving away from an item, and maybe more toward a buff. What about blessing a teammate for a short duration that allows them to proc a small shield on-hit, for example?
Overall excited to test the changes. Will post more feedback after testing 🙂